EP3454637A1 - Procédé de marquage naturel d'une laitue - Google Patents

Procédé de marquage naturel d'une laitue

Info

Publication number
EP3454637A1
EP3454637A1 EP17721186.9A EP17721186A EP3454637A1 EP 3454637 A1 EP3454637 A1 EP 3454637A1 EP 17721186 A EP17721186 A EP 17721186A EP 3454637 A1 EP3454637 A1 EP 3454637A1
Authority
EP
European Patent Office
Prior art keywords
light
plant part
plant
pigment
mask
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP17721186.9A
Other languages
German (de)
English (en)
Other versions
EP3454637B1 (fr
Inventor
Céline Catherine Sarah NICOLE
Marcellinus Petrus Carolus Michael Krijn
Gus VAN DER FELTZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Signify Holding BV
Original Assignee
Signify Holding BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Signify Holding BV filed Critical Signify Holding BV
Priority to PL17721186T priority Critical patent/PL3454637T3/pl
Publication of EP3454637A1 publication Critical patent/EP3454637A1/fr
Application granted granted Critical
Publication of EP3454637B1 publication Critical patent/EP3454637B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
    • A23L5/40—Colouring or decolouring of foods
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G7/00—Botany in general
    • A01G7/04—Electric or magnetic or acoustic treatment of plants for promoting growth
    • A01G7/045—Electric or magnetic or acoustic treatment of plants for promoting growth with electric lighting
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23N—MACHINES OR APPARATUS FOR TREATING HARVESTED FRUIT, VEGETABLES OR FLOWER BULBS IN BULK, NOT OTHERWISE PROVIDED FOR; PEELING VEGETABLES OR FRUIT IN BULK; APPARATUS FOR PREPARING ANIMAL FEEDING- STUFFS
    • A23N15/00—Machines or apparatus for other treatment of fruits or vegetables for human purposes; Machines or apparatus for topping or skinning flower bulbs
    • A23N15/06—Devices for other treatment of fruit, e.g. marking, maturing, polishing

Definitions

  • the invention relates to a method for lighting a plant.
  • the invention also relates to a method of cultivating a plant.
  • the invention also relates to a computer program product for executing the method for lighting a plant.
  • the invention relates to a lighting system.
  • FR2815816 describes a mask which is part transparent, on which is deposited, by laser or ink jet printing, opaque pigments so as to form clear and dark parts.
  • the mask is chosen from amongst, color or black and white negative film, a color or black and white slide film.
  • the clear and dark parts of the mask form a group of recognizable distinctive signs, such as letter characters.
  • FR2815816 further describes a method of selectively coloring the skin of a fruit which naturally changes color when exposed to light, which includes: (a) choosing a zone on the skin of the fruit which will change its color under the action of natural or artificial light; apply to the chosen fruit zone a mask having one or more transparent (clear) zones sensitive to natural or artificial light, as well as one or more or weak (dark) light transmitting zones; illuminate the mask on the fruit for a time sufficiently long so that the fruit zone under the mask naturally changes color, in correspondence which the clear and dark parts of the mask.
  • WO 2012/090897 Al discloses a plant cultivation system comprising an ion generating device which can generate positive ions and negative ions in a space in which a plant is to be cultivated. This system enables the enhancement of the accumulation of a pigment in the plant.
  • Plants use the process of photosynthesis to convert light, C0 2 and H 2 0 into carbohydrates (sugars). These sugars are used to fuel metabolic processes. Sugars are also used for biomass formation. This biomass formation includes stem elongation, increase of leaf area, flowering, fruit formation, etc.. The photoreceptor responsible for photosynthesis chlorophyll. Apart from photosynthesis, also photoperiodism, phototropism and photomorphogenesis are representative processes related to interaction between radiation and plants:
  • photoperiodism refers to the ability that plants have to sense and measure the periodicity of radiation (e.g. to induce flowering),
  • phototropism refers to the growth movement of the plant towards and away from the radiation
  • photomorphogenesis refers to the change in form in response to the quality and quantity of radiation.
  • an alternative lighting system that can e.g. be used for executing the alternative method for providing a pattern on a plant part, which preferably further at least partly obviates one or more of above-described drawbacks.
  • Some of those nutrients are pigments which give the plant a photo- protective property or have a role in attracting pollinators (in flowers mainly).
  • Anthocyanin is a pigment present in many crops, which role is to protect the plant upon too high radiation. This pigment is naturally produced by a plant when the plant encounters an abiotic stress. The pigment can have a red, purple or blue coloration depending on the pH in the plant.
  • Anthocyanin accumulation can be controlled and activated using light intensity.
  • the shaded side of an anthocyanic apple is less red than the sunlit side of the apple, and the concentration of anthocyanin in the two sides is genotype dependent.
  • anthocyanin biosynthesis can be a light wavelength-dependent process.
  • ultraviolet (UV) light appears to be particularly effective in stimulating anthocyanin biosynthesis in several different plant species.
  • blue light also appears to have high capacity in coloring e.g. red type lettuce (anthocyanic coloration) and specifically a capacity which is (substantially) higher compared to that of red light. This effect appears to be independent of the developmental stage of a non-senescing leaf such that light-dependent stimulation of anthocyanin biosynthesis can be triggered at any moment in response to light.
  • lettuce red coloration can be actively controlled by manipulating light properties either in early vegetative growth stages or a few days before harvest.
  • the stimulation of the process is locally restricted within the boundaries of a cell such as light perception at cell level is required for the stimulation of anthocyanin biosynthesis (some other responses to light can be communicated between plant cells, tissues even organs). This means that leaves which are shaded will not color upon a unidirectional light illumination.
  • a growth phase light recipe to color e.g. red type lettuce crop, which is also working for most vegetables accumulating anthocyanin.
  • the coloration of a vegetable during its growth with light can thereby be controlled well.
  • anthocyanin accumulation can be well controlled in time and locally using lighting as an abiotic stress, especially as substantially sole abiotic stress.
  • Using this property it is e.g. possible to imprint a logo or a brand or a colored pattern on a vegetable playing with the contrast of colored (red) or non-colored (green) that the vegetable produces naturally.
  • the invention provides a method for providing a nonuniform pigment distribution in a first plant part of a pigment generating plant, which (pigment generating plant) accumulates pigment upon exposure by light, during indoor cultivation of said plant, wherein the first plant part (“first part”) comprises a second plant part ("second part") and a third plant part ("third part"), the method comprising subjecting in a first lighting stage at least the first plant part to first light conditions that inhibit or prevent pigment accumulation in said first plant part, and subsequently subjecting in a second lighting stage the second plant part of said first plant part to second light conditions that promote pigment accumulation in said second plant part while (still) subjecting the third plant part of said first plant part to third light conditions that inhibit or prevent pigment accumulation in said third plant part.
  • Plant especially refers to Plantae, even more especially to
  • Embryophyta such as angiosperms.
  • first plant part or more in general “plant part” may refer to a leaf, a flower leaf, a stem, a branch, and a fruit.
  • plant part does not refer to parts of the plant that are in general below a solid or liquid surface, such as under the soil.
  • the term "plant part” may refer to substantially the entire part of the plant above the soil, such as in the case of (red) lettuce. In yet other embodiments, it may refer to only part thereof, such as a single leaf. In further embodiments, the term “plant part” may refer to an entire fruit, such as an apple. In yet other embodiments, it may refer to only part thereof.
  • the term “plant part” especially refers to those parts of plant wherein pigments may be generated, such as to the epidermis of (part of) the plant, or the pericarp of (part of) the plant, or the mesophyll containing part of (part of) the plant.
  • first plant part especially refers to a part of the plant at least including part of the plant that may directly receive light. Hence, the first plant part may include at least a part of the outer layer of the plant.
  • the invention is especially related to horticulture applications, even more especially to horticulture applications wherein lighting can be controlled, such as in plant factories, in glass houses, or in other at least partly closed environments wherein lighting can be controlled. Yet even more especially, the invention relates to applications wherein plants are grown under substantially only artificial lighting conditions. Especially, the invention is related to indoor growth or indoor horticulture applications. Hence, the invention is mainly directed to indoor generation of fruits, vegetables, flowers, etc., though optionally the invention may also be directed to indoor generation of trees and other types of plants.
  • the plants that are suitable for application of the method are especially those plants that under normal outdoor conditions generate pigments in at least part of the plant when exposed to light. Plants generate under influence of light, especially an abundance of light, pigments, in leaves and/or fruits. Hence, abiotic stress (especially due to light) may induce pigment formation.
  • the pigment generating plant is especially a plant that generates or accumulates pigments upon exposure by light, especially light comprising blue and/or UV components.
  • the plants that can be used in the present invention are those plants of which at least part naturally changes color when exposed to light. In this invention, such plants are indicated as pigment generating plants.
  • pigment accumulation especially refers to the accumulation of a pigment in the plant (part). Pigment accumulation is a natural reaction of some plants upon abiotic stress, such as (a surplus of) solar (and/or artificial) light.
  • abiotic stress such as (a surplus of) solar (and/or artificial) light.
  • the (lighting) conditions of the first stage may be chosen such that etiolated growth is prevented but also such that coloration is also substantially prevented.
  • these conditions can be found by the person skilled in the art.
  • the conditions such as temperature, humidity, supply of water and supply of nutrients are substantially normal and within the acceptable range for the plant growth.
  • the only abiotic stress that may be applied may be due to the lighting conditions. Under normal growth conditions, biomass production continues and growth is not impaired.
  • the invention especially provides a method for providing a nonuniform pigment distribution in a first plant part of a pigment generating plant during indoor cultivation of said plant, wherein the first plant part comprises a second plant part and a third plant part, the method comprising subjecting in a first stage at least the first plant part to abiotic non- stress conditions, and subsequently subjecting in a second stage the second plant part of said first plant part to abiotic stress conditions thereby promoting pigment accumulation in said second plant part while (still) subjecting the third plant part of said first plant part abiotic non-stress conditions that inhibit or prevent pigment accumulation in said third plant part.
  • the method comprises indoor cultivation of said plant under abiotic non-stress conditions during the first stage.
  • the plant is subjected to conditions that do not generate abiotic stress, i.e. abiotic non-stress conditions. Whereas a biomass production continues, substantial pigment accumulation may in this way be prevented or inhibited.
  • the pigments that may be produced are especially anthocyanins and/or other flavonoids.
  • Anthocyanins are naturally occurring pigments that may appear red, purple, or blue depending on the pH. Anthocyanins occur in tissues of higher plants, including leaves, stems, roots, flowers, and fruits.
  • the plant comprises an apple, or a pear, etc.. Especially, in embodiments the plant comprises a leafy vegetable. In yet further embodiments, the plant is selected from the group consisting of a red type lettuce, a red mustard, etc.. Especially, the method is suitable for leafy vegetables. Hence, in embodiments the plant comprises a red type lettuce (Lactuca sativa) or a red leafy green (from the Brassica family), for example red mustard.
  • light may be provided substantially only for creation of biomass and in the second stage, e.g. when there is enough biomass, the second plant part is subjected to abiotic stress, leading to pigment accumulation in that part.
  • the term "plant part” may refer to the entire (above- ground) part of a plant, but may also refer to only part thereof.
  • the remainder of the plant may be subjected to conditions that accumulate pigment.
  • the first lighting stage is a stage wherein the entire plant is subjected to abiotic non-stress conditions.
  • Abiotic stress conditions may in embodiments also include the supply of nutrients and the control of the temperature such that pigment accumulation is reduced or inhibited.
  • first plant part may refer to a plurality of first plant parts
  • the different types of patterns may be provided to different parts of the plant. However, also the same or different patterns may be provided on different leaves of the plant. When assuming a fruit as plant part, a plurality of fruits of the same plant may be provided with a pattern according to the method of the invention.
  • the first plant part comprises a second plant part and a third plant part.
  • patterns may be created, e.g. with light letters amidst a pigment accumulated background, or especially vice versa, pigment accumulated letters amidst a lighter color or pale background.
  • such (pale) background may in embodiments be surrounded by parts of the plant that have accumulated pigment, e.g. due to the lighting in the second stage.
  • the method also comprises selecting the second plant part and the third plant part to form a pattern provided during the second lighting stage by pigment content differences, with the second plant part having a higher pigment
  • the second plant part and the third plant part may form a pattern due to the non-uniform man-controlled pigment accumulation.
  • the pattern may in embodiments comprise one or more of a letter, a symbol, and a code.
  • the pattern may in embodiments also comprise a favicon, etc..
  • one or more words (such as "fresh") may be pigment printed in the first plant part.
  • one or more symbols (such as a trademark or logo) may be pigment printed in the first plant part.
  • one or more codes such as a bar code or QR code may be pigment printed in the first plant part.
  • the pattern may be regular or random, etc..
  • the method (for providing a non-uniform pigment distribution (in a first plant part) as described herein may also be indicated as method for providing a
  • the non-uniform distribution is a man-made or non- natural non-uniform distribution.
  • the first plant part and thus also especially the second plant part, may upon exposure to light also develop a non-uniform pigment distribution.
  • the third plant part will (in average) be lighter than the second plant part.
  • the (non-uniform) pigment accumulation is substantially higher in the second plant part than in the third plant part.
  • the area averaged reflectance in the visible (380-780 nm) for the second plant part may be at least 5% smaller than for the third plant part; in the wavelength part where the pigment absorbs light, this reduction in area averaged reflectance may even be larger, such as a reduction of at least 10%, even more especially at least a reduction with 20%.
  • the area averaged anthocyanin index for the second plant part may be at least 5% higher, such as at least 10%, even more especially at least 20%, higher than for the third plant part.
  • the anthocyanin index can e.g. be measured using the DUALEX Scientific (Force-A, Polyphenol and chlorophyll-meter, Orsay Cedex - France). In embodiments, a plurality of measurements is done per plant and averaged to obtain the data.
  • the anthocyanin index is calculated by the DUALEX using the following formula:
  • Anthocyanin index Lo g —— -
  • Near - infrared fluo indicates the fluorescence in the IR (in the wavelenght range of about 700-900 nm), "excited red” indicates under excitation in the red (600-700 nm), and “excitation green” indicates under excitation in the green (495-570 nm).
  • the infrared fluorescence under red and green excitation are compared.
  • the method as described herein especially includes two stages, though there may be more than two stages.
  • the method comprises subjecting in a first (lighting) stage at least the first plant part to first light conditions that inhibit or prevent pigment accumulation in (at least) said first plant part.
  • Pigment accumulation can be prevented by offering growth conditions that do not provide abiotic stress.
  • the choice of the light recipe may be relevant. Offering light that contains substantially red contributions and relatively low UV and/or blue contributions may lead to biomass formation without coloration in the case of e.g. leafy vegetables. This may keep the plant (part) relatively pale during the first stage.
  • accumulation may especially refer to a low light level and/or a reduced blue and/or UV content of the light. Note that such conditions may in embodiments also be achieved with a substantial complete blockade of the light. Such solution, however, may also severely inhibit growth. Hence, especially plants that color during growth are with the method of the invention especially grown while receiving light, such that biomass may (still) be created, but coloration is substantially inhibited. Hence, abiotic non-stress light may be provided, such as in embodiments with light that has a substantial red (including optionally far red) component (see also below).
  • the daily light integral may be chosen such that it is in the range of about 40-80% of the light saturation curve of the chlorophyll fluorescence, such as 40-60%, like 40-50%.
  • Each plant part such as a plant leave, has a characteristic light saturation curve defined by the plant genotype and age and pigmentation of the leaves. This light saturation curve is related to the maximum photosynthesis that is possible to achieve as a function of light levels. This can be measured for each type of plant. For a maximal plant growth light maximum should be chosen just below the saturation level. In order to achieve a growth without coloration, staying half way (about 40-60%) to the saturation is reasonable. In order to optimize growth speed, a more optimum light level may be defined per cultivar.
  • the daily light integral for red type lettuce is in the range of about 7-9 mol/m 2 /d (i.e. 7-9 mol per square meter per day).
  • the DLI refers to the PAR range, i.e. 400-700 nm.
  • the amount of (UV) radiation having a wavelength below 400 nm, if any, such as in the range of 200-400 nm, should be 1% or less, such as 0.3%> or less, such as even less than 0.1 %, of the DLI provided during the first (lighting) stage.
  • a light level of 7 mol/day per m 2 or less is applied, such as in the range of 3-6 mol/day per m 2 .
  • the light saturation curve may e.g. be measured with a miniPPM, such as provided by EARS Plant Photosynthesis Monitoring Ltd, and as e.g. described in the internet publication
  • the first stage wherein the plant (part) may be grown under conditions favoring biomass production but reducing or inhibiting pigment accumulation may take at least a week, such as in the range of 2-20 weeks. This may depend upon the type of plant.
  • the first stage can be defined such that there is enough biomass in order to print a pattern, if the leaves are too small the print will be more difficult and not visible. Some plant grow faster than others, and e.g. some lettuces are harvested before they reach the maximum growth size as consumers prefer young leaves which are less bitter.
  • the second lighting stage may be commenced.
  • the method may further comprise subsequently subjecting in a second lighting stage the second plant part of said first plant part to second light conditions that promote pigment accumulation in said second plant part while (still) subjecting the third plant part of said first plant part to third light conditions that inhibit or prevent pigment accumulation in said third plant part.
  • pigment will accumulate at the second plant part, wherein no or less pigment will be accumulated at the third plant part.
  • a pattern may be written with pigment in the first plant part.
  • the third (light) conditions may be same as the first light conditions. They may also differ, but both the first (light) conditions and second (light) conditions are especially conditions under which in the first and/or third plant part pigment accumulation is prevented or at least inhibited.
  • light conditions that promote pigment accumulation may especially refer to a high light level and/or an increased blue and/or UV content of the light.
  • abiotic stress light may be provided, such as light that has a substantial UV and/or blue component (see also below).
  • the second stage, wherein the plant (part) may be grown under conditions favoring pigment production may take a few days, such as in the range of 1-15 days. But this may (also) depend upon the type of plant.
  • the method comprises providing in the first stage first light to said first plant part and providing in the second lighting stage second light to said second plant part, wherein a relative photon content of UV light and blue light of the second light is higher than of the first light, and wherein a relative photon content of red light and deep red light of the first light is higher than of the second light.
  • the first light may especially be used to provide abiotic non-stress conditions; the second light may especially be used to provide abiotic stress conditions thereby inducing pigment accumulation.
  • second light may be provided to parts of the plant that are not comprised by the first plant part.
  • first light (or third light) may be provided to parts of the plant that are not comprised by the first plant part.
  • first light or third light
  • first light may be provided to parts of the plant that are not comprised by the first plant part.
  • the first light may include 0% UV and 5% blue and the second light may include 5% UV and 20 % blue.
  • the above condition e.g.
  • the third light conditions may (substantially) be identical to the first light conditions, but may in embodiments also refer to the substantial absence of light (to the third plant part). Hence, in embodiments the third light conditions may be a continuation of the first light conditions. However, in other embodiments the third light conditions may e.g. be a blocking of second light conditions reaching the third plant part (while the second plant part is subjected to the second light conditions).
  • the relative photon content in the wavelength range up to 475 nm is equal to or smaller than 15%, such as equal to or smaller than 10%, for the first light and equal to or larger than 20% for the second light, such as equal to or larger than 30%
  • the relative photon content in the wavelength range of at least 600 nm is at least 30% for the first light, especially at least 40%, and at least 10% for the second light, but at maximum 80% for the second light, such as at maximum 60%, even more especially at maximum 50%.
  • the right conditions can be created to provide the pigment accumulation pattern in the first plant part.
  • chlorophyll a and b Two important absorption peaks of chlorophyll a and b are located in the red and blue regions, especially from 625-675 nm and from 425-475 nm, respectively.
  • PAR photo synthetically active radiation
  • the first plant part may move due to ventilation, irrigation, or other factors, it may be desirable to immobilize the first plant part during at least the second stage.
  • the main part of the growth may have been finished; the plant, especially the plant part, may be substantially mature, or at least be close to a predefined harvest stage.
  • the first plant part may be configured in a fixed position to provide a clearly visible pattern without substantially blurring of the pigment borders.
  • the method may further comprise immobilizing the first plant part during the second lighting stage and subjecting the second plant part to said second light conditions.
  • the method may further comprise projecting second light to said second plant part, such as to impose the second light conditions to the second plant part.
  • Projection may be done with a mask in contact with the first plant part, or with a remote mask, and also with a GOBO type of projector (i.e. projector with a mask between the light source and the optics of the projector ("go before optics").
  • a GOBO type of projector i.e. projector with a mask between the light source and the optics of the projector ("go before optics").
  • a mask it may not be necessary to use a specific light source to create the second light conditions to the second plant part of the first plant part only. For instance, the entire plant may be subjected to the second light conditions, except for the third plant part.
  • the method may (thus) further comprise providing a mask to the first plant part, wherein the mask comprises a second mask part that is transmissive for light and a third mask part that is less light transmissive to light than the second mask part or is not light transmissive, with the second mask part corresponding to the second plant part and the third mask part corresponding to the third plant part.
  • the method may further comprise coating the mask to the first plant part, wherein the coating is selected from the group consisting of an edible coating, a water washable coating, and a light degradable coating.
  • the coating may be an edible coating and/or a water washable coating, yet even more especially, at least a washable coating. In this way, the coating may easily be washed away after application of the pattern.
  • the method may further comprise subjecting the second plant part to laser light comprising said second light. Also in this way the second light conditions may be achieved. Also in these embodiments, it may be desirable to immobilize the first plant part during at least the second stage. Especially when using a device with a movable laser beam, or a movable laser device, it may be possible to provide the accumulated pigment pattern to different plant parts by moving the laser beam from one plant part to the other. Optionally, in combination with a sensor possible movements of the first plant part may be corrected for.
  • the invention also provides the product obtainable by the method as defined herein.
  • the plant (part) may be harvested.
  • the invention provides a method for indoor cultivating a pigment generating plant, the method comprising subjecting a plant seedling for the plant to plant growing conditions (to grow the plant seedling to a (substantially) mature plant) and harvesting the plant or a first plant part thereof, wherein prior to harvesting the plant is subjected to the method for providing a non-uniform pigment distribution in a first plant part as defined herein.
  • the invention also provides the product obtainable by such method.
  • the method may further comprise a third lighting stage, applied after the pattern creating second lighting stage, wherein in the third lighting stage the first plant part is subjected to a fourth light condition creating abiotic non- stress conditions wherein biomass production is continued but substantial (further) pigment accumulation is prevented or inhibited in the first plant part.
  • the fourth lighting condition may be substantially the same as the first light condition or the third light condition, but may also be different, provided that it prevents or inihibit pigment accumulation.
  • the amount of UV and blue light (relative photon content in the wavelength range up to 475 nm) and the amount of red and deep red light (relative photon content in the wavelength range of at least 600 nm) in the fourth light condition may comply with the ranges as mentioned above in respect of the first/third light condition.
  • the pattern created in the second lighting stage is allowed to grow as part of the further growth and biomass creation of the first plant part due to application of the fourth light condition.
  • the immobilization of the first plant part during the second lighting stage is stopped and the first plant part is released to further grow in this third lighting stage.
  • masks or coatings used for the patterning in the second lighting stage may be removed before the start of the the third lighting stage.
  • the effect of the additional third lighting stage is the the pigment pattern will further grow with the leaf and expand, and maybe distort or blurr in a specific way, which may have a desired additional artistic purpose.
  • a further advantage of not patterning in the pre-harvest stage of plant cultivation is that, a specific pre-harvest light treatment, for example to controlling certain nutrient contents of the plant part(s), does not interfer with the pigment accumulation light treatment in the second lighting stage and is not influenced or jeopardized by a specific mask used in the pigment accumulation light treatment.
  • the second lighting stage may therefor occur post-harvest. It is however envisioned that the pigment accumulation will be less pronounced when the second lighting stage is applied post-harvest.
  • the method for indoor cultivating a pigment generating plant is especially an indoor horticulture method, such as applied in green houses or plant factories, especially plant factories. Such methods are in general highly or fully controlled.
  • the invention also provides a computer program (product) enabled to carry out the method as defined herein when loaded on a computer.
  • the invention provides a record carrier (or data carrier, such as a USB stick, a CD, etc.) storing a computer program (product) as defined herein.
  • the computer program (product) when running on a computer or loaded into a computer, brings about, or is capable of bringing about, the method as described herein.
  • the term record carrier especially refers to a computer-readable medium and/or memory.
  • the computer-readable medium and/or memory may be any recordable medium (e.g., RAM, ROM, removable memory, CD-ROM, hard drives, DVD, floppy disks or memory cards) or may be a transmission medium (e.g., a network comprising fiber-optics, the world-wide web, cables, and/or a wireless channel using, for example, time-division multiple access, code-division multiple access, or other wireless communication systems).
  • a recordable medium e.g., RAM, ROM, removable memory, CD-ROM, hard drives, DVD, floppy disks or memory cards
  • a transmission medium e.g., a network comprising fiber-optics, the world-wide web, cables, and/or a wireless channel using, for example, time-division multiple access, code-division multiple access, or other wireless communication systems.
  • Any medium known or developed that can store information suitable for use with a computer system may be used as the computer-readable medium and/or memory.
  • the computer-readable medium, the memory, and/or any other memories may be long-term, short-term, or a combination of long- and-short term memories. These memories configure the processor/controller to implement the methods, operational acts, and functions disclosed herein.
  • the memories may be distributed or local and the processor, where additional processors may be provided, may be distributed or singular.
  • the memories may be implemented as electrical, magnetic or optical memory, or any combination of these or other types of storage devices.
  • the term "memory" should be construed broadly enough to encompass any information able to be read from or written to an address in the addressable space accessed by a processor. With this definition, information on a network, such as the Internet, is still within memory, for instance, because the processor may retrieve the information from the network.
  • the controllers/processors and the memories may be any type.
  • the processor may be capable of performing the various described operations and executing instructions stored in the memory.
  • the processor may be an application-specific or general-use integrated circuit(s).
  • the processor may be a dedicated processor for performing in accordance with the present system or may be a general-purpose processor wherein only one of many functions operates for performing in accordance with the present system.
  • the processor may operate utilizing a program portion, multiple program segments, or may be a hardware device utilizing a dedicated or multi- purpose integrated circuit.
  • Each of the above systems utilized for remote controlling of light sources may be utilized in conjunction with further systems.
  • the invention provides a lighting system for lighting (at least) a first plant part of a pigment generating plant, the lighting system comprising a light source configured to generate light and optionally a mask system configured to configure a mask in a beam of light upstream of the first plant part. Additionally, the mask system may also be configured to immobilize the first plant part.
  • the lighting system is especially configured to execute the herein described method for providing a non-uniform pigment distribution in a first plant part.
  • the lighting system is configured to subject in a first lighting stage at least the first plant part to first light conditions that inhibit or prevent pigment accumulation in said first plant part, and subsequently subjecting in a second lighting stage the second plant part of said first plant part to second light conditions that promote pigment accumulation in said second plant part while subjecting the third plant part of said first plant part to third light conditions that inhibit or prevent pigment accumulation in said third plant part.
  • the lighting system may include a light source, especially a plurality of light sources.
  • the lighting system may include one or more light sources which have a variable spectral light distribution, by which the light source may be able to provide the different light conditions.
  • a plurality of different light sources are configured to provide the different light conditions.
  • the lighting system may include a laser light source.
  • one or more light sources may have a tunable directionality of the light source light.
  • the lighting system may also be configured in embodiments to control the direction of the light source light of one or more light sources. This may be obtained with one or more of moving light sources and/or moving optics (that may be comprised by the light sources).
  • the lighting system may include a mask system and/or a fixation system.
  • the lighting system may be comprised by a horticulture system, which (latter) may also be configured to control one or more of temperature, humidity, irrigation, nutrient supply, etc..
  • the term “controlling” especially refers to determining the behavior or supervising the running of an element. Hence, herein “controlling” may e.g. refer to imposing behavior to the light source etc..
  • the lighting system, light source, and method described herein may be configured and/or may include a wide array of light modulation techniques.
  • a contact mask or proximity mask may be applied.
  • a 'slide projector' (a remote mask that is imaged on the leaf) or a digital projector ('beamer') may be applied.
  • a laser may be used (to direct write). And then there may be more - this is the range of what the inventors have seen used in photolithography.
  • the invention also provides such mask system per se.
  • the invention also provides a fixation unit for fixating the first plant part.
  • a fixation unit for fixating the first plant part.
  • Such fixation unit may in embodiments be comprised by the mask system.
  • a mask may not be necessary, and only a fixation unit may be applied. However, in embodiments it may even not be necessary to fixate a plant part when laser writing.
  • upstream and downstream relate to an arrangement of items or features relative to the propagation of the light from a light generating means (here the especially the light source), wherein relative to a first position within a beam of light from the light generating means, a second position in the beam of light closer to the light generating means is “upstream”, and a third position within the beam of light further away from the light generating means is “downstream”.
  • upstream of the first plant part may in embodiments refer to physical contact (of a mask) with the first plant part and may in other embodiments refer to a non-zero distance (of the mask) from the first plant part (including masks that may be included by a light source, such as a GOBO (see above))
  • the light source comprises a solid state LED light source (such as a LED or laser diode).
  • the term "light source” may also relate to a plurality of light sources.
  • the term LED may also refer to a plurality of LEDs.
  • a light source is especially configured to provide light source light.
  • the light source light is used for providing the desired lighting conditions, optionally (temporarily) in combination with a mask.
  • white light herein, is known to the person skilled in the art.
  • CCT correlated color temperature
  • Blue light is herein defined as 400-500 nm.
  • (deep) red especially refers to light having a wavelength in the range of 600-700 nm.
  • the term light especially refers to any radiation in the wavelength range of 300-800 nm, even though part thereof may be considered UV radiation or IR radiation.
  • PAR refers to the wavelength range of 400-700 nm.
  • Far red radiation is in the range of 700-800 nm.
  • FIG.l schematically depicts some stages of embodiments of a method described herein;
  • Figs. 2a-2c schematically depicts some aspects of the invention as well as some variants
  • FIG. 3 schematically depicts a further aspect of the invention as well as some variants.
  • Fig. 1 schematically depicts some stages of embodiments of a method of the invention as described herein.
  • the method may include indoor cultivating a pigment generating plant 100.
  • the method includes amongst others subjecting a plant seedling 1100 for the plant, such as here schematically depicted a non- fully grown plant, such as a plant just sprouted above the ground, with the ground being indicated with reference 7, to plant growing conditions, as indicated with the first stage I.
  • first light conditions or first light 11a may be applied, that does substantially not provide abiotic stress.
  • pigment formation may be low or (nearly) zero.
  • References N and T indicate providing the necessary nutrients, including water, and subjecting the seedling 1100 and the plant 100 to the necessary temperature conditions. Both the supplies of nutrients as well as the temperature conditions are especially selected such that abiotic stress is small or absent.
  • a final stage is a harvesting stage, indicated with III, wherein the plant 100, or a first plant part 110 thereof is harvested.
  • the plant Prior to harvesting, but in embodiments when the plant or plant part is substantially mature, the plant is subjected to the method for providing a non-uniform pigment distribution in a first plant part 110 as described herein.
  • This method may include providing the non-uniform pigment distribution in a first plant part 110 of the pigment generating plant 100 during indoor cultivation of said plant 100.
  • the first plant part 110 comprises a second plant part 120 and a third plant part 130.
  • the second plant part 120 and third plant part 130 may be used to provide a pattern including a plurality of patterns, such as a word, a trademark, a code, etc..
  • This method comprises subjecting in a first lighting stage I at least the first plant part 110 to first light conditions that inhibit or prevent pigment accumulation in said first plant part 110, and subsequently subjecting in a second lighting stage II the second plant part 120 of said first plant part 110 to second light conditions that promote pigment accumulation in said second plant part 120 while subjecting the third plant part 130 of said first plant part 110 to third light conditions that inhibit or prevent pigment accumulation in said third plant part 130.
  • the pattern provided is indicated with reference 140, here a "V".
  • the second plant part 120, and optionally other plant parts except for the third plant part 130 is subjected to abiotic stress substantially only due to the application of the second light conditions.
  • abiotic stress is substantially only provided with lighting conditions.
  • the product may be obtained in several ways, of which some are schematically depicted in Figs. 2a-2c (and Fig. 3).
  • Fig. 2a schematically shows in side view an embodiment wherein the method further comprising immobilizing the first plant part 110 during (at least) the second lighting stage and subjecting the second plant part to said second light conditions by projecting second light (not shown) to said second plant part or by subjecting the second plant part to laser light comprising said second light.
  • a fixation unit 170 may be applied, optionally in combination with a mask 160.
  • the combination of fixation unit and mask or fixation unit and mask holder is herein also indicated as mask system 1700. With the fixation unit and/or mask system 1700 the first plant part 110 may be fixated, e.g. a few days.
  • Fig. 2b schematically depicts in top view part of the plant 100, in top view, with the mask over the plant part 110.
  • the mask comprises a second mask part 162 that is transmissive for light - here a V-sign - and a third mask part 163 that is less light
  • a laser or a GOBO projector may be applied. In such instance there is no mask close to the first plant part or even in contact with the first plant part.
  • Fixation may nevertheless be desired, see Fig. 2c wherein the first plant part 110 is fixated with the fixation unit 170.
  • Light may write the pattern 140, such as with the laser or GOBO (not shown).
  • Fig. 3 schematically depicts an embodiment of a lighting system 1000 for lighting a first plant part of a pigment generating plant, including some variants of the lighting system.
  • the lighting system 1000 comprises a light source 10 configured to generate light source light 11 (or shortly indicated “light 11") and a mask system 1700 configured to immobilize the first plant part and to configure a mask 160 in a beam of light 10 upstream of the first plant part.
  • Different light sources 10 are schematically depicted, such as light sources 10 that can only provide first light and light sources that can only provide second light, but also a light source that can provide one or more of first light 11a and second light 1 lb.
  • a laser light source 10 is depicted at the right of the drawing, with the laser light source 10 especially configured to provide laser light 150b comprising e.g. UV or blue light for accumulation of pigment.
  • Light in general is indicated with reference 11.
  • the experiment was done on lettuce grown under a DLI of 5 mol per day per m 2 using a composition of red and white LED and an additional 15 to 25 % of far red LED light (defined as 700-800 nm). This value is the average light level we would get in winter time in Europe.
  • a mask in order to get the pattern or branding imprint and change the light level to 14 mol/day per m 2 using 50% red and 50% blue only preferably with a long photoperiod (>18h) for long day plants.
  • a low DLI might slow down the growth of the lettuce.
  • a slightly higher light level can be used (8 mol/day per m 2 ) in combination of a mask over the zone where coloration needs to be avoided.
  • 8 mol/day per m 2 With a light level of 8 mol/day per m 2 , a very mild coloration will occur on the lettuce exposed to the light and only with higher light level and the suppression of far red and change in the light quality the deep coloration (purple) will be achieved.
  • Preventing the coloration is achieved by using a combination of low light level and light rich in far red.
  • Red type lettuce was grown under these conditions and did not color red. Thereafter, a mask was applied to part of the lettuce, and the entire lettuce crop was subjected to light also including UV and blue light.
  • the DLI was increased to about 8 mol per day per m 2 .
  • a logo was generated by pigment accumulation.
  • Red mustard was also grown under less than 8 mol/day/m 2 . After 4 to 5 weeks the mustard can be exposed to a higher photoperiod light (up to 24h per day) and with a higher blue content (50% of total PAR light), the DLI is then in the range of 13-16 mol/day/m2. The red mustard needs at least 7 days to accumulate anthocyanin and make a significant color change.
  • substantially may also include embodiments with “entirely”, “completely”, “all”, etc. Hence, in embodiments the adjective substantially may also be removed. Where applicable, the term “substantially” may also relate to 90% or higher, such as 95% or higher, especially 99%) or higher, even more especially 99.5% or higher, including 100%).
  • the term “comprise” includes also embodiments wherein the term “comprises” means “consists of.
  • the term “and/or” especially relates to one or more of the items mentioned before and after "and/or”. For instance, a phrase “item 1 and/or item 2" and similar phrases may relate to one or more of item 1 and item 2.
  • the term “comprising” may in an embodiment refer to “consisting of but may in another embodiment also refer to "containing at least the defined species and optionally one or more other species”.
  • the invention further applies to a device comprising one or more of the characterizing features described in the description and/or shown in the attached drawings.
  • the invention further pertains to a method or process comprising one or more of the characterizing features described in the description and/or shown in the attached drawings.

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  • Life Sciences & Earth Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Botany (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
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  • Nutrition Science (AREA)
  • Health & Medical Sciences (AREA)
  • Cultivation Of Plants (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

La présente invention concerne un procédé de fourniture d'une distribution de pigment non uniforme dans une première partie de plante (110) d'une plante génératrice de pigment (100), qui accumule le pigment lors de l'exposition à la lumière, pendant la culture intérieure de ladite plante (100), la première partie de plante (110) comprenant une deuxième partie de plante (120) et une troisième partie de plante (130), le procédé comprenant la soumission dans une première étape d'éclairage d'au moins la première partie de plante (110) à des premières conditions d'éclairage qui inhibent ou préviennent l'accumulation de pigment dans ladite première partie de plante (110), et ensuite la soumission dans une deuxième étape d'éclairage de la deuxième partie de plante (120) de ladite première partie de plante (110) à des deuxièmes conditions d'éclairage qui stimulent l'accumulation de pigments dans ladite deuxième partie de plante (120) tout en soumettant la troisième partie de plante (130) de ladite première partie de plante (110) à des troisièmes conditions d'éclairage qui inhibent ou préviennent l'accumulation de pigment dans ladite troisième partie de plante (130).
EP17721186.9A 2016-05-09 2017-05-09 Procédé pour marquer naturellement une laitue Active EP3454637B1 (fr)

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EP3484269A4 (fr) * 2016-07-13 2020-07-29 Just Greens, LLC Création d'un motif de couleur de feuille
JP7368865B2 (ja) 2018-07-23 2023-10-25 ヘリポニックス、エルエルシー 自動植物成長システム
US11252874B2 (en) * 2020-04-24 2022-02-22 Seoul Viosys Co., Ltd. Light source module for plant cultivation
CN112400514A (zh) * 2020-10-30 2021-02-26 苏州易云生物科技有限公司 一种基于光替换的生物生长检测方法

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JPS4918618A (fr) 1972-06-10 1974-02-19
JPH01137925A (ja) 1987-11-25 1989-05-30 Atsushi Makinae 果実皮面に文字、図形等を表現する方法
CN1012784B (zh) 1988-10-17 1991-06-12 王爱本 水果装璜成型方法
JPH04370041A (ja) 1991-06-17 1992-12-22 Kokichi Kodama 文字入りスイカの栽培方法
US5660747A (en) 1994-11-04 1997-08-26 Atrion Medical Products, Inc. Method of laser marking of produce
KR20000051124A (ko) * 1999-01-19 2000-08-16 이춘길 오이, 가지 및 호박 재배기
FR2815816A1 (fr) 2000-10-30 2002-05-03 Bernard Spiess Procede de coloration selective de la peau d'un fruit et produits ainsi obtenus
EP1763991A1 (fr) 2005-09-20 2007-03-21 Rijk Zwaan Zaadteelt en Zaadhandel B.V. Laitue rouge
CN1930945A (zh) 2006-09-28 2007-03-21 邹玉琴 一种在水蜜桃上通过光合反应生存文字、图案的制作方法
ES2356013B2 (es) 2010-10-28 2011-11-15 Laser Food 2007, S.L. Procedimiento de marcado de frutos.
JP2012135288A (ja) 2010-12-27 2012-07-19 Sharp Corp 色素蓄積促進システム、イオン発生装置および色素蓄積促進方法
JP6156677B2 (ja) 2012-07-26 2017-07-05 シャープライフサイエンス株式会社 照明装置、植物栽培システムおよび植物栽培方法
JP6064205B2 (ja) * 2012-10-02 2017-01-25 パナソニックＩｐマネジメント株式会社 照明装置
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AU2017261655A1 (en) 2019-01-03
RU2018143390A (ru) 2020-06-10
DK3454637T3 (da) 2021-08-30
JP2019520052A (ja) 2019-07-18
EP3454637B1 (fr) 2021-07-07
US20190142038A1 (en) 2019-05-16
CN109152335B (zh) 2021-11-30
CN109152335A (zh) 2019-01-04
ES2888812T3 (es) 2022-01-07
PL3454637T3 (pl) 2021-12-20
JP6697581B2 (ja) 2020-05-20
US11666076B2 (en) 2023-06-06
AU2017261655B2 (en) 2023-02-16

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